John o beten



(N0 Mod a TELEGRAPH INSULATOR. No. 347,635. Patented Aug. 17, 1886 UNITED STATES PATENT Grinds.

JOHN OBRTEN, OF NE\V YORK, N. Y., ASSIGNOR TO \VILLIAM BROOKF] ELD,

OF SAME PLACE.

TELEGRAPH-lNSULATOR.

SPECIFICATION forming part of Letters Patent No. 347,635, dated August 1'7, 1886.

Application filed May 30, 1836.

To all whom it may concern:

Be it known that I, JouN OBRTEN, a citizen of the United States, residing at New York, in the county and State of New York,

5 have invented new and useful Improvements in Telegraphinsulators, of which the following is a specification.

This invention has for its object to provide a novel and efficient telegraph-insnlator; and

it consists in the features of construction hereinafter described and claimed, reference be ing made to the accompanying drawings, illustrating the invention, in which- Figure 1 is a section in the plane 00 00, Fig.

[ 2. Fig. 2 is a side elevation of my insulator. Fig. 3 is a horizontal section in the planeg 3 Fig. 2.

Similar letters indicate corresponding parts.

In the drawings, the letter A designates the 0 body of a telegraph-insulator, which is by preference made of glass, but which may be made of any other material suitable for the purpose. The insulator shown is provided with an internal screw-thread, for the pur pose of securing the same in position on a telegraph-pole; but my invention is not restricted to screw-insulators, since it can be applied to insulators provided with other suitable means for securing the same in position on a telegraph-pole.

On opposite sides of the body A are formed two lugs, 13, which serve to support the line wire both while the same is being put up and also after the same is permanently in position. That part of the surface of the lugs on which the linewire rests is made convex, so as to permit the same being drawn taut at a comparatively acute angle. XVhen the wires are being placed in position over insu- .0 lators provided with straight line-wire-supporting surfaces, the wires will kink or bend at the edge of these supports as they are being drawn taut, unless the line-man on the ground is a considerable distance from the insulator and draws the wire over the insulater at a very obtuse angle. To obviate this difficulty, I have formed the line-ivire-supporting surface, as above described. The ad- Scrial No. 202.761.

(No model.)

vantage of having two such supporting-surfaces, besides being a support for two wires, when necessary, is that in making sharp bonds or a return-bend either lug of theinsulator can be employed without turning the insulator, a very great advantage when the insulators are tightly lixed to the poles.

To support the tie-wires by which the line-wire is usually secured to the insulator, ridges G are formed on the body of the insulator, between the lugs B. These ridges serve to hold the tiewirc in place, particularly during the operation of drawing the linewvire taut. These ridges, together with the annular shoulder D, also forms a rece s in which the tie-wires rest, and serve to hold the same in position on the insulators. A somewhat similar recess is formed between the lugs B and the shoulder D for retaining the line-wire.

By the construction above described, the advantages of the old form of insulator, having an annular recess for supporting the wire when in position, are retained, with the additional advantage of a support for the wire during the whole operation of running the wires, which is particularly necessary when the insulator is attached directly to a pole without the use of a cross arm.

XVhat I claim as new, and desire to secure by Letters Patent, is

1. A telegraph-insulator provided with a line-Wire lug, having a convex supportingsurface for said wire, substantially as described.

2. A telegraph-insulator provided with two line-wires, supporting-lugs arranged at opposite sides of its body, and each having a convex wire-supporting surface, substantially as and for the purposes described.

3. A telegraph-insulator having two opposite line-wire-supporting lugs, each having a convex wiresupporting surface, and provid ed intermediate of said lugs with two oppositely-arranged laterally-projecting tie-wiresupporting lugs, substantially in line with the convex surfaces of the line-wire-supporting lugs, substantially as described.

4. A telegraph-insulator provided with two my-hand and seal in the presence of two subline-wire-supporbing lugs on opposite sides scribing witnesses. i

of its body and with two oppositely-arranged 1 1 and lateraliyprojecting t-ie-wire-supporting JOHN O BRIEN' 5 ridges between said lugs, substantially as de- Witnesses:

scribed. W. HAUFF,

In testimony whereof I have hereunto set; OTTO HUFELAUR. I 

